What is the Gospel
The Power of God to Salvation
For I am not ashamed of the gospel of Christ, for it is the power of God to Salvation for everyone who believes, for the Jew first and also the Greek.
Rom. 1:16
Christ died, was buried and rose again the third day
For I delivered to you first of all that which I also received; that Christ died for our sins according to the scriptures,
and that He was buried, and that He rose again the third day according to the scriptures.
1Cor. 15:3+4
You were sealed with the Holy Spirit
In Him you also trusted, after you heard the word of truth, the gospel of your salvation; in whom also, having believed, you were sealed with the Holy Spirit of promise.
Eph. 1:13